Steam sterilizer



FIG. 1 is a top perspective view of a steam sterilizer incorporating theclaimed design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a right side plan view thereof, the left side being a mirrorimage thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is a top elevational view thereof; and,

FIG. 6 is a bottom elevational view thereof.

The ornamental design for a steam sterilizer, as is shown and described herein. 